Apparatus for applying coating



Jan. 15, 1929. 1,698,945

D. v. DRlscoLL APPARATUS FOR APPLYING COATING Filed March 12, 1927 Patented J an. l5, 1929.

OF MASSACHUSETTS.

p 1,698,945 UNITED STATES. PATENT OFFICE.v

DANIEL VINCENT DRISCOLL, OF MALDEN, MASSACHUSETTS, ASSIGNOR TO INTER- NATIONAL ENGINEERING GORP., OF MALDEN', MASSACHUSETTS, A CORPORATION APPARATUS FOR APPLYING COATING.

Application filed March V12, 1927. Serial No. 174,803.

This invention relates to apparatus for applying to surfaces a coating of paint, varnish, japan, pigment or other material and has for its object the production ofa device of this character which is simple in construetion, easily operated and very effective 1n use.

illustrated in the accompanying drawings.

For the purpose of illustrating the invention, one preferred form thereof is illustrated in the drawings, this form having been found to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized, and the invention is not limited to the precise arrangement and orf ganization of these instrumentalities as herein shown and described except as required by the scope of the appended claims.

Of the drawings:

Figure 1 represents a plan of a device em-V bodying the principles of the present invention.

Figure 2 represents a vertical section on line 2, 2, on Fig. l.

Figure 3 represents an elevation of the air chamber with the annulus threaded to the outer wallthereof and showing within said.

chamber the nozzle for the discharge of a coating material.

vFigure 4 represents an elevation of the outer face of the rotatable closing disk or air nozzle. s

Figurel 5 represents an elevation of the inner face of said disk.

Figure 6. represents a vertical section of the air chamber and discharge nozzle therefor showing the annulus closing the radial passages from said charriber and the inclined discharge orifices through the rotatable disk forming the air nozzle, and

Figure 7 represents a vertical section through the nozzle through which the coating material is discharged and showing the val've therefor in open position.

Similar characters indicate like parts throughout the several gures of the drawings.

IIn the drawings 10 is the body portion of the device used in applying a coating of man terial, said body portion having near one end thereof an opening 11 in which is dis- This object is attained by the mechanism posed a member 12 having a cone-shaped face 13 fitted to the upper end of the openinU 11.

L 'he upper end of the member 12 is provided with a hook 14 by which the device may be supported when desired.

This member 12 has a downwardly extending threaded boss 15 upon which is threaded the lock nut 16 which is adjustable on said boss to retain said cone-shaped face uponl its seat to preventl leakage at this point.

The upper end of the nut 16 has a conesh'aped face 17 which tightly fits the lower end of the opening 11 thereby h ermetically sealing said opening ll'and preventing the escape of any air therefrom except through the passage 18 to the nozzle to be hereinafter vertical passages 20, 22 communicating at their upper ends with a horizontalyalve chamber 23. y

The body portion 10 is provided beneath the projection 21 with an extension 24 and a boss 25. y

The hollow handle 26, at its upper end,

surrounds the extension 24 and bears against a flat faced seat 27 portion 10.

Threaded to the boss 25 is the tube 28 the upper end of the bore of which communi- Cates with the lower end of the vertical passage 22.

i The lower end of the handle 26 is closed and against the bottom wall thereof bears the flat sided head 29, the lower end of which is threaded to receive a pipe from the source of air supply.

Formed upon the handle 26 is a finger guard 30 the object` of which isto prevent the hand in gripping the handle from slipping upwardly, so as tol interfere with the Aformed upon said body operation of the trigger 31 pivoted at 32 to an arm 33 projecting upwardly fromv the projection 21. v In the valve chamber 23 is a valve. 34 shown in Fig. 2 upon its .seat and closing all communication between the passages 2i), 22', said valve being retained upon its seat by means of a spring 35. c

The rear end ofthe valve chamber 23 has a closure 36 threaded therein and centrally disposedin this closure'36 is the threaded member 37 having a serrated head 38 at its outer end by which it may be turned to adjust the member 37 endwise.

The member 37 has a stop member 39 projecting from its inner end the purpose of which is to limit the rearward movement of the valve 34 when it is desiredl to permit the passage of compressed air from the passage 22 to the passage 20 and then through t-he passage 19 into the opening or air space 11.

When the member 37 has been properly adjusted it is locked in position by means of the nut 40. i

Extendingtransversely of the passage 19 is the upper end 'of a regulating valve 41 which is threaded to a boss 42 formed upon the body portion 10.

The upper-end of the valve 41 is conical as shown at 43 and adapted to enter the vconical recess 44 extending from the passage 19.

, When the valve 41 is in the position shown- The upper end of the trigger 31 is bifurcated and straddles a U-shaped member 46 secured to the forward end of the stem 47 of the valve 34. t

This U-shaped member' 46 has oppositely disposed lugs 48 against which the trigger 31 bears.

The forward movement of the trig er 31 is limited by coming in contact wii the shoulders 49 on the opposite sides of the body portion 10.

The member 12 is provided on its rear face with a boss 50 to which is threaded one end of a tube 51 the opposite endkof which has threaded thereto a closing cap 52 through which extends a rod or valve member 53, the rear end of which has adjustably mounted thereon the nuts 54, 55.

The rod or valve member 53 has an enlarged portion 56 within the tube 51 and between thisenlarged portion 56 and the cap 52 is a spring 57 which tends to force the rod or valve member 53 forward.

In the forward wall of the member 12 is secured the chambered nozzle member 58 having its forward end cone-shaped las shown at 59, and provided Lwith a small tubular projection 60.

Theforward end of the rod or valve member 53 is conicalas at 61 and ts the inner wall of the cone-shaped part 59 and from this conical end extends a pin 62 through the bore of the tubular projection 60.

The chamber of the nozzle member 58 ,communicates with a passage 63 extending downwardly in the member 12 and through the threaded boss 15.

The lower threaded end of the boss 15 is lannulus '65 adjustable endwise thereof.

The inner chamber of this cylinder 64 communicates with the air assage 18 and the forward end of the cylinder wall has a plurality of radial' notches or passages 66 formed therein, preferably three in number.

When the annulus 65 is in the position indicated in Fig. 2 of the drawings these notches 66 are uncovered permitting air to pass outwardly through these notches but if the annulus 65 is moved forward into the position shown in Fig. 66, the notches may be wholly closed so that no air may ass.

The annulus 65 has an annular forward extension 67 to lthe exterior of which is threaded the 'cup-shaped member or sleeve 68, the forward end'of which extends over a flange on the rotatable disk 69 having outwardly extending lugs 7 O by which it may be moved about its axis.

The disk 69 has extendingtherethrough the air orifices 71 inclined toward each other as shown in Figs. 2 and 6,A the outer ends of' these passages being opposite the lugs 7() while their inner ends communicate with the annular space` between the inner face of the disk 69l and the outer end of the extension 67.

The nuts 54, 55 are normally spaced from I the notched upright 75 forming a part of the U-shaped member 46 so that when the trigger 3l is moved towards the handle 26 there Will be no movement of the rod or valve member 53 until the upright 7 5 comes into' contact With the nut- 54 and continues its movement to the rear.

lVhen the rod or valve member` 53 is thus moved to the rear the'pin extension 62 Will be removed from the orifice in the coating material nozzle 58 and this coating material may then be discharged in a circular iilm from said nozzle, the compressed air surrounding said nozzle being discharged at the same time and causing the iilni oi' coating material to :torm a spray substantially circular in cross section.

This is only true, however, when the annulus 65 has been adjusted to entirely cover the notches 66, as shown in Fig. 6, leaving no space between the end oit the extension 67 and the rear tace of the disk 69.

lt instead ot a circular spray, it is desired to discharge the coating material in a `flat spray the annulus 65 is moved into the position shown in Fig. 2, thereby creating an annular space between the end oi" the er;-

tension 67 and disk 69 through .vhicii may pass to the inclined ornces 7l.

dfllhen the air is discharged Jrom these t orifices 'il against the spray being discharged from the nozzle 58, the tvvo oppositely disposed jets of air will impinge upon the centrally discharged spray and change its shape in cross section from a circular form to the form of a sheet of spray.

The disk 69 may be moved about its anis relatively to the cup-shaped member or sleeve 68 and then by turning the cupshaped member or sleeve 68 said disk may be clamped in any desired position .so that thesheet of spray may be either vertical, horizontal or at any other desired angle.

When the device is in use the operator grasps the handle 2,6 with three lingers below thev guard 30 leaving the :toretlnger above the guard ready to actuate the trigger When the operator with the oreinger moves the trigger to the rear, thistrigger bearing upon the lugs 48 Will move the valve 34 into Contact with the stop 39 thereby uncovering the passage 22 and permitting the compressed air or other motive agent to pass through `the passages 20, 19, the opening or air space 11, and passage 18, into the air chamber -in the extension 64 from Which `-it may pass through the central orifice in the disk 69 and in case the notches or passages 66 are uncovered through the inclined orifices 71. K

The passage 22 will be'partially uncovered before the upright contacts with the nut 54 and commences to move the rod 53 and consequently the compressed air will be discharged through the orice in disk` 69 before the 'valve 53 is opened to permit the discharge of the coating material.

Consequently no coating material can be discharged until the motive agent' is ready to take care of it and break it into a spray.

0n the return movement ot' the valve rod 53 and air valve 34, When the trigger is released, the conical end of the .valve 58 Will come to its seat and stop further discharge oit the coating material before the supply of motive agent has been fully cut oli" by the valve 34 coming to its seat.

This feature of the invention is of considerable importance as no coating material can be discharged at any time without the motive agent being present to breakit into spray.

The amount oi". motive agent moving through the passage 19 may be regulated by the adjustment of the valve Ll1 While the an'iount of opening of the valve 8st may be varied by adjusting the stop member 39. 'This Iis obviously or" great advantage.

Moreover anothe advantage is the provision i one time or tively to the be varied as deed by adgusting a rod 58.

enber 39 limit but through the med fhe ll-snaped member i6 it det-eri ines the opening of the valve 53.

adjust g the stop member 39 the amount or discharge ci the coating materately det rmined so that l .i excessive amount ct material oe discharged on the article being coated.

'The size of the valve is such that When yit is opened more air will be admitted to theypassage 19 than is necessary to take care ot the coating material being discharged.

ln vien7 or this fact the regulating valve d1 may be adjustedlto permit the passage ot the exact amount "of air required to take care of any particular coating material being used. The closing disk 69 is provided on its inner face with a cylindrical projection 76 Which accurately lits into the bore of the projection 67 so that the small tubularv projection 60 is always centrally disposed .in the central opening 77 in the disk 69.

This is of considerable importance as it insures an even distributionn of the coating material as it is discharged from the nozzle 58, the discharged material being surrounded upon all' sides by an equal amount of air.

The spring 74 acting upon the packings 72 simply retains the packings on their seats and can never be adjusted to such an extent ras to cause the valve rod 53 and prevent its free movement.

Itis believed that the operation and many packings 72 to bind upon theflee advantages of the invention will be understood without further description.

Having thus described my invention, I claim- 1. In a device of the class described p rol vided with passagesfor compressed air and vided with passages for compressed air and a coating material; a discharge nozzle for the coating material; a valve therefor; a valve for the air passage having a stem; `a

member secured to said'stem and having a lateral lug integral therewith: a pivoted trigger coacting with one side of the periphery of said lug to move said member and open the air valve; ya forked projection to said-member straddling the nozzle valv-e;

and a nut on the nozzle valve between said lug and projection adjustable endwise thereof and adapted to be engaged by said projection during the movement of said member.

3. In a device of the class described provided with passages for compressed air and a coating material; a discharge nozzle for the coating material; a valve therefor; a valve for the air passage having a stem; a member secured to said stem and having a lateral lug; a pivoted trigger coacting with said lug to move said member and open the air valve; an upwardly extending forked projection to said member straddling the nozzle valve; and a nut on the nozzle valve betweensaid lug and projection adjustable endwise thereof and adapted to be engaged by said projection during the movement of said member.

4. In a ldevice of the class described provided with passages for compressedvair and a coating' material; a discharge nozzle for .the coating material; a valve therefor; a valve for the air passage having a stem; enclosed `springs for retaining both valves seated under normal conditions; a member secured to the stem of the air valve and having a lateral lug formed integral therewith; la pivoted trigger at one side of said lug coacting therewith to move said member and open the air valve; an upwardly extending forked projection to said member straddling the nozzle valve; and a nut on the nozzle valve between said projection and lug ad- 2. In a device of the class described projustable endwise 4thereof andV adapted to be engaged by said projection during the movement of said member.

5..In a device of the class described, an elongated body having ,an air passage eX- tending lengthwise thereof and communieating with a discharge nozzle at one end; a vertical passage communicating with the other end of said passage; a second vertical passage, both vertical passages communicating at the top with a valve chamber; a valve therein normally closing communication between said vertical passages; means for supplying a motive agent to the second vertical passage; means for moving said valve to effect communication between said vertical passages; and an adjustable stop member eX- tending into said valve chamber in thepath of said valve.

6. In a device of the class described, a body provided at one end with an opening therethrough and having an air passage leading thereto; means for controllings the supply of air to said opening; a vertical support at thejendfof said body having a tubular extension centrally positioned in said o ening and forming with the' wall thereo an annular space,'said extension having a cylindrical bore and said support having a cylindrical extension forming the chamber communicating with said annular space; a closing disk for said chamber having a central opening therein; a nozzle within said chamber having its ,bore communicating with the boreof said extension; a valve for normally closing said nozzle; and meansfor opening said valve.. l

7. In a device of the class described, a body provided at one end with an opening therethrough and having an air passage leading thereto; means for controlling the supply of air to said opening; a vertical support at the end of .said body having a tubular extension centrally positioned in said opening and forming with the wall thereof an annular space, said extension having Ia cylindrical bore and said support having a cylindrical extension forming the chamber communicating with said annular space; a closing disk for said chamber having a' central opening therein; a nozzle within said chamber having yits bore communicating with the bore of said extension and provided with a dischargeorice alined with said central opening; a'valve for normally closing said nozzle; and means for opening said valve.

8. In a device of the class described, a body provided at one end with an opening therethrough and having an air passage leading thereto; means'for controlling the supply of air to said opening; a vertical support at the end of said body having a tubular extension centrally positioned in said opening and forming with the wall thereof an'annular space,l said extension having a,

lia

cylindrical bore and said support having a` chamber communicating `with said annular space; a closing disk for said chamber havv ing a central opening therein; a nozzle With,- in said chamber having its bore communicating with the bore ofsaid extension and provided With'a tubular extension in said central opening; a valve for normally closing said nozzle and having a pin at its end nor-- *mally disposed in the bore of said tubular movable therefrom antl having an air chamber therein and a passage for a coating material; means for admitting air to said chamber; a nozzle Within said chamber and communicating with said passage; a valve controlling the discharge from said nozzle; and a disk closing said chamber having an opening in alinement with said nozzle.

l0. In a device of the class described, a member having an airchamber therein and apassage for a coating material; means for admitting air to said chamber; a nozzle Within said chamber communicating With said passage; a valve controlling the dis-` charge from said nozzle; a rotatable disk closing said chamber having an` opening in alinement with said nozzle; radial passages from said chamber; an annulus on said member movable to close said radial passages; and means `for locking said disk to said member, said disk having other discharge orifices communicating with said radial passages when uncovered.

l1. In a device of the class described, a

member having an air chamber therein and a passage for a coating material; means for admitting air tol said chamber;i a nozzle Within said. chamber communicating with said passage; a valve controlling the discharge from said nozzle; a rotatable disk closing said chamber having an opening` in alinement with said nozzle; an annulus on said member movable lengthwise thereof; radial passages from said chamber to Van annular space between said disk and annulus Which passages are adapted to be closed by said annulus; and means for locking said disk to said member, said 'disk having oppositely disposed inclined oriices from said annular space to direct air against the film of coating material discharged through the disk opening. l

12. In a device of the class described, a

member having an air chamber therein;l

means :tor admitting air thereto; a nozzle Within saidchamber; `means for admitting a coating material thereto; a valve controlling the discharge from saidnozzle; a rotatable disk closing said chamber having an opening in alinement with said nozzle and oppositely disposed inclined discharge orifices; radial passages from said chamber;

an annulus movable on said member to closef said radial passagesand the inner ends of said inclined passages; and means for locking said disk to said member.

13. ln a device of the class described, a nozzle for the discharge of atcoating material; a valve regulating the discharge of material from said nozzle; a bearing in" which said valve reciprocates and having a recessed hub extending therefrom; a housing surrounding andv adjustable on said hub; a packing in the recess of said hub and surrounding the valve; a spring Within said recessed hub forcing said packing to its seat and anotherspring Within said housing adapted to close said valve.

14. In a device of the class described, a member having an air chamber therein; means for admitting 'air thereto; a nozzle Within said chamber; means for admitting a coating material thereto; a valve cntrolling the discharge from said nozzle; a flanged rotatable disk closing said chamber having an opening in alinement with said nozzle; an annulus on said member movable lengthwise and forming with said disk an annular space from Which extend radial passages to said chamber, said annulus in DANIEL'VINcEiiT DRIscoLn 

